Relay.



F. B. COOK.

RELAY.

APPLICATION FILED DEC. 14. 1914.

1 185,370. Pate1 ted May 30, 1910.

QIIIIIHI llli! l1 IIIIII omrriin STATES PATENT OFFICE.

FRANK 1;. 000K,

OF CHICAGO, ILLINOIS, ASSIGNOB TO FRANK B. COOK COMPANY, OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

RELAY.

Specification of Letters Patent.

Patented May 30, 1916.

Application filed December 14, 1914. Serial No. 877,124.

Toall whom it may concern Be it known that I, -FRANK B. Coon, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Relays, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to electrical devices employing windings and is of particular service where such windings form component parts of electro-magnets that in turn are included in the construction of relays.

My invention may generally be described as a relay including a relay winding, two

I single piece armatures entering into the for mation of the same armature switch for governingan electrical circuit, these armatures being mounted at one end of the winding and extending beyond the other end of the winding, a magnetic path portion bringing the twmarmaturcs into parallel. magnetic circuits, to which magnetic circuits said magnetic path portion is common, and

- two contacts at the other end of the winding opposite to that where the armatures are mounted, these contacts pertaining to the same circuit operable in opposite directions one by one armature and the other by the other armature to reduce armature movement.

I will explain my invention more fully by reference to the accompanying drawing showing the preferred embodiment thereof and in which Figure 1 is a plan view of a structure including features of my invention; Fig. 2isa sectional view-on line 2 2 of Fig. 3; Fig. 3 is a side elevation of the structure illustrated in Figs. 1 and 2; Fig. 1 is a perspective view illustrating a portion of the structure in detail; Fig. 5 is a front elevation of the structure; Fig. 6 is a sectional view on line 6 6 of Fig. 4; and Fig. 7 is a perspective View illustrating the front end of one of the springs shown in Fig. 4.

Like parts are indicated by similar characters of reference throughout the different figures.

The magnets 1, 2 are shown as being mounted in pairs inasmuch as the structure thereof illustrated is welladapted to enable them to be employed respectively as telephone cutoff and line relays, though the magnets are i not to be limited to this use. -These magnets, or relays, are of construction which is generally similar and similar parts of the two relays will be given similarcharacters of reference. Each magnet includes a magnetic core 3 and two symmetrically arranged snwle plece armatures 4, 5 which embrace the magnet winding 6 that surrounds the core andalso the spools 7 that take part in defining the winding space. The arma tures are sufliciently soft to permit them to perform their function but are desirably made of strip or ribbon steel possessing sufficient resilience so that the armature may be selfretractive when relieved of the attractive influence of the magnet coil and core. The armatures are rear'wardly' extended into rear wings 8 and 9 between which the core, which is oblong in cross section, is disposed, a screw 10 passing through the armature wings 8, 9 and the core 8 and into threaded engagement with a non-magnetic and preferably metallic mounting plate 11 whereby the magnet is mounted. Positioning pins 12 or other formations cooperate with the screw 10 to maintain the predetermined position of the magnet with respect to its mounting plate. The forward ends of the armatures are extended into forwardly projecting wings 13 and 14 which, due to the resilience of the armatures, will bear against rigidly'supported adjustable back stops 15 and 16 when the magnet is deenergized. These back stops are desirablyi in the form of nuts threaded upon a rigid pin 17 which is desirably in threaded engagement with the core 3 but which passes freely through holes in the armature wings 13 and 1d.

' It will be observed that the armatures 4 and 5 are in parallel magnetic circuits that include the magnetic core 3 common thereto, this core being of suliicient mass to enable it to carry the flux in both magnetic circuits without interposing undue reluctance. hen the, structure is embraced in a relay both armatures are preferably constituted parts of the same armature switch which thus has two\ armature elements moved by the relay wind ing and core when energized, instead of 1 single armature element as relays were hitherto constructed. It is apparent that a relay with a single armature must include ofeach of the air gaps included in each of the parallel magnetic circuits of the structure of my invention whereby I am enabled materially to increase the efliciency of the relay since the armatures of my relay are not serially included in the same magnetic circuit but are included in independent magnec-tic circuits each having one-half the air gap that normally obtained in relays. In order to enable the armatures to control more than one circuit and also provide better facility for insulation, the armatures are preferably not included in the circuits they control but are caused to control such. circuits through the intermediation of spring contacts.

I have illustrated the armature 4 as in controlling relation to two springs 18 and the armature 5 as in controlling relation to two springs 19. To this end the armature a may carry a large pin of insulation 20 having peripheral grooves in which tongues (illustrated at 21 in Fig. '7) may be received, while the armature 5 may similarly carry a large pin of insulation 22 having peripheral grooves that engage tongues similar to tongues 91 that are carried by the springs 19. These pins 20 and 22 may be mounted upon wings 23, 24 projecting from and integrally formed with the armatures 4, 5. Whenever the relay is energized its armatures will be attracted at their forward ends toward the core 3 whereby the armature i will move the contacts 18 in one direction and the armature 5 will move the contacts 19 in an opposite direction. in the case of the relay 1, the contacts 18 are then brought into engagement with their complemental contacts 19'from which they are normally separated, Whereas in the case of relay 2 the contacts 18 are moved in one direction and the contacts 19 in an opposite direction so as to effect separation between the contacts 18 and the contacts 19 normally in engagement therewith.

I have indicated the contacts 18 and 19 of relay 1 belonging to the same circuit as in controlling relation to a normally open circuit that includes a lamp 25 and a battery 26, simply for purposes of illustration clearly to indicate that each contact 18 pertains to a contact 19 in controlling relation with the same circuit. It is apparent that, by causing the mutual approach or mutual separation of the contacts 18, 19 pertaining to the same circuit and efiecti-ng this movement of these contacts by armatures that are included in parallel magnetic circuits that contain the same relay core, the efficiency of the relay employed for effecting such move ment of these contacts is materially increased as compared with relays of the prior art that are adapted to effect the same circuit control. The contacts 18 and 19 are desirably in the form of leaf springs which extend longitudinally of the relay cores to which they are individual. The rear ends of the leaf springs are suitably insulated from each other and are mounted upon a wing extension 27 of the mounting plate 11 by means of mounting screws 28. Thus not only are the relay cores and armatm'es mounted directly upon the non-magnetic mounting plate 11 to enable the cores themsel es to constitute mountings for the relay windings but contact springs as well are mounted upon said mounting plate independently of the magnet structure. I thus am enabled greatly to simplify the construction and assembly of the relay parts. \Vhere the non-magnetic plate 11 is of metal, such as brass, it in turn may be mounted upon a base of insulating material 29.

\Vhile I have herein shown and particularly described the preferred embodiment of my invention I do not wish to be limited to the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but

Having thus described my invention. I claim as new and desire to secure by Letters Patent the following:

A relay including a relay Winding; two single piece armatures entering into the formation of the same armature switch for governing an electrical circuit,. these armatures being mounted at one end ofthe winding and extending beyond the other end of the winding; a magnetic path portion bringing the two armatures into parallel magnetic circuits, to which magnetic circuits said magnetic path portion is common; and two contacts at the other end of the winding opposite to that where the armatures are mounted, these contacts pertaining to the same circuit being operable in opposite directions one by one armature and the other by the other armature to reduce armature movement.

In witness whereof I hereunto subscribe my name this first day of December, A..'D.

FRANK B. COOK. -Witnesses-:

ETTA L. WHITE, G. L. CRAGG. 

